CN104060840A - Construction method for lifting large-span dome net rack by using bolt sphere truss lifter - Google Patents

Construction method for lifting large-span dome net rack by using bolt sphere truss lifter Download PDF

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Publication number
CN104060840A
CN104060840A CN201410293260.2A CN201410293260A CN104060840A CN 104060840 A CN104060840 A CN 104060840A CN 201410293260 A CN201410293260 A CN 201410293260A CN 104060840 A CN104060840 A CN 104060840A
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China
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rack
bolt sphere
bolt
center
construction
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CN201410293260.2A
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Chinese (zh)
Inventor
刘付亚福
赵晓彬
刘志强
劳锦洪
林谷
杨轶
邓汝锦
尹维元
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广州市第三建筑工程有限公司
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Priority to CN201410293260.2A priority Critical patent/CN104060840A/en
Publication of CN104060840A publication Critical patent/CN104060840A/en

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Abstract

The invention discloses a construction method for lifting a large-span dome net rack by using a bolt sphere truss lifter. The construction method comprises the following steps: splicing a center net rack of the large-span dome net rack by using a bolt sphere and a rod piece; lifting the center net rack of the large-span dome top net rack from the bottom of a building to a preset position on the top of the building, and fixing temporarily; continuously splicing a peripheral net rack of the large-span dome net rack around the center net rack by using the bolt sphere and the rod piece, and connecting the peripheral net rack with the center net rack and the top end of the building. By adopting the method, stress balance and stabilization of the large-span net rack in a lifting process are realized, the construction period is shortened, the construction cost is saved, the construction quality can be better controlled, and the engineering quality can be optimized at one time.

Description

Use bolt sphere truss elevator to promote the construction method of large-span domes rack

Technical field

The present invention relates to a kind of construction method of large-span domes rack, relate in particular to a kind of construction method of using bolt sphere truss elevator to promote large-span domes rack.

Background technology

Latticed shell structure is the outstanding representative of large-span space structure, and it is widely used.The spherical steel screen connecting with bolted spherical node have modern design attractive in appearance, be full of variety, grand, tall and big, rod member is regular by force, grid is standardized, space stiffness is large and the advantage such as good integrity.

Yet existing large-span domes rack is all to construct with high altitude bulk method substantially, is in work high above the ground, rod member and bolt sphere to be connect one by one.The method construction period is long, construction cost is large, work high above the ground quality is not easy to control.

Summary of the invention

Based on this, the invention reside in the defect that overcomes prior art, a kind of construction method of using bolt sphere truss elevator to promote large-span domes rack is provided, the method is conducive to shorten the construction period, save construction cost, and be conducive to better construction quality be controlled, workmanship is Cheng You once.

Its technical scheme is as follows:

Use bolt sphere truss elevator to promote a construction method for large-span domes rack, comprise the following steps:

The center rack that splices large-span domes rack by rod member;

Use bolt sphere truss elevator that described center rack is promoted to precalculated position, structure top by structure bottom, and carry out temporary fixed;

Around center rack and use the continuous peripheral rack of spelling large-span domes rack of rod member, make peripheral rack connect center rack and structure top.

Because the splicing of center rack can complete at Ground Operation, center rack is promoted to the peripheral rack of the continuous spelling in precalculated position, structure top after splicing completes again, compare with traditional high altitude bulk method, difficulty of construction reduces, thereby can improve efficiency of construction, save construction cost, also be more conducive to control construction quality.And by promote described center rack or large-span domes rack with bolt sphere truss elevator, can realize the stress equalization of center each suspension centre of rack and stablize, the lifting of control centre's rack or large-span domes rack preferably, this is conducive to be avoided center rack to break down in lifting process, thereby is more conducive to improve efficiency of construction and controls construction quality.

Further, described center rack by many bolt sphere truss elevators by structure bottom center Synchronous lifting to precalculated position, structure top, before promoting described center rack, bolt sphere truss elevator described in installing many on structure top in advance, and make these many bolt sphere truss elevators circumferentially uniformly-spaced arranging around structure.Thereby, be conducive to realize the stress equalization of each suspension centre on the rack of center.

Further, described bolt sphere truss elevator includes bolt sphere truss, chain sling and power set, described bolt sphere truss comprises base, frame body and arm frame, described frame body is fixedly mounted on described base, described arm frame is fixedly connected on it described frame, and arm frame has angle of inclination with respect to frame body and makes the below formation of this arm frame hang a year space, described chain sling is arranged on described bolt sphere truss, this chain sling matches with described power set, make this chain sling carry the material of slinging in space hanging.Thereby, cooperation between described power set, chain sling and bolt sphere truss, make this bolt sphere truss elevator when promoting described center rack, also have easy to operate, easily control and the advantage such as safe and reliable, thereby the lifting of control centre's rack better, this contributes to improve construction quality and efficiency of construction; In addition, owing to having used bolt sphere truss, can make this bolt sphere truss elevator can be better stressed, the weight of Geng Neng center rack, the center rack of making can promote better.

Further, described bolt sphere truss comprises a plurality of triangular elements, described frame body and arm frame build by triangular element, this triangular element comprises shank of bolt and bolt sphere, between two adjacent shanks of bolt, by described bolt sphere, be fixedly linked, described shank of bolt is linear pattern shank of bolt, the two ends of this linear pattern shank of bolt are equipped with bolt end, bolt end is provided with thread, described bolt sphere is provided with screw, and bolt end makes shank of bolt be fixedly connected with bolt sphere by screwing in described screw.Thereby this structure design, except bolt sphere truss elevator can be born larger weight, can also be convenient to bolt sphere truss elevator in the installation at structure top.

Further, described chain sling includes guiding fixed pulley, wire rope and suspension hook, described power set are hoist engine, described suspension hook is provided with movable pulley, described guiding fixed pulley is fixedly mounted on described bolt sphere truss, one end of described wire rope is fixed on the front end of described arm frame, the other end of wire rope is on the hoist engine of wearing described in being connected to after described movable pulley and guiding fixed pulley, described guiding fixed pulley is made as three, three guiding fixed pulleys are fixedly mounted on respectively the junction of frame body and base, the place, summit of the corner of frame body and arm frame and arm frame leading section.Thereby, the enhanced feature of bolt sphere truss elevator that this structure has arranged specific implementation, the convenient control of realization of this enhanced feature, easy operating.

Further, in the step of the center of lifting rack, first with bolt sphere truss elevator, center rack is tried to hang, and then formally lifting.Its object be that center rack can be stablized and stress equalization be promoted to precalculated position, structure top.

Further, the height that described examination is hung is made as 300mm, and when examination is hung highly for 200mm, measure the height of each suspension centre, and the height of adjusting each suspension centre is on sustained height.By examination, hang, be conducive to avoid generative center rack in formal lifting process to promote the abnormal conditions such as uneven, and if hang in process and occur that abnormal conditions can more convenient adjustment in examination.

Further, after examination is hung, first temporarily stop promoting center rack, and the connection status of hoist cable, the stressing conditions of bolt sphere truss elevator and the stress of suspension centre are checked, and formally lifting again after inspection is errorless.

Further, in the step of formal lifting, the every lifting of center rack 50cm is as a stage, and in each stage, all the connection status of hoist cable, the stressing conditions of bolt sphere truss elevator and the stress of suspension centre are checked, and according to actual conditions, the state of suspension centre is adjusted.Its object is to guarantee that center rack can be promoted to stable equilibrium precalculated position, structure top.

Further, in the step of formal lifting, in each improvement stage, all guarantee on the rack of center that each suspension centre is with the speed Synchronous lifting of 100mm/min, and guarantee that the difference in height of adjacent two suspension centres of center rack is less than or equal to 100mm.Be to guarantee that center rack promotes with stable equilibrium's state.

Further, on the rack of center, be hung with plumb bob and invar tape, in the process that Dui center rack promotes, by observing the suspension status of suspension wire hammer, and by invar tape, observe the height of suspension centre, the equilibrium state that observation center rack promotes, and adjust accordingly the equilibrium state of center rack.

Further, before center rack promotes, by wire rope, center rack bottom node is carried out drawing.Thereby, can control centre the radial dimension of rack bottom, can prevent that center rack from producing bulk deformation in lifting process.

Further, before center rack promotes, the suspension centre place of center rack is reinforced.Thereby, can make the hoisting point position of center rack more firm, hoist cable can be connected with suspension centre more securely.

Beneficial effect of the present invention is: the present invention can improve efficiency of construction, shortens the construction period, saves construction cost, and is conducive to better construction quality be controlled, and workmanship is Cheng You once.

Accompanying drawing explanation

Fig. 1 is the flow chart that the use bolt sphere truss elevator described in the embodiment of the present invention promotes the construction method of large-span domes rack.

Fig. 2 is the overall structure schematic diagram of the bolt sphere truss elevator described in the embodiment of the present invention.

Fig. 3 is the lateral view of the bolt sphere truss elevator described in the embodiment of the present invention.

Fig. 4 is the construction schematic diagram that to be ready promoting after the center rack described in the embodiment of the present invention assembles.

Fig. 5 is the construction schematic diagram that completes peripheral rack splicing after the center rack described in the embodiment of the present invention is raised.

Reference numeral:

1, base, 2, frame body, 3, arm frame, 4, suspension hook, 5, guiding fixed pulley, 6, wire rope, 7, hoist engine, 8, center rack, 9, peripheral rack, 10, structure, 20, bolt sphere truss elevator.

The specific embodiment

Below embodiments of the invention are elaborated:

As shown in Figure 4 and Figure 5, a kind of construction method of using bolt sphere truss elevator to promote large-span domes rack, comprises the following steps:

The center rack that splices large-span domes rack by bolt sphere and rod member;

Use bolt sphere truss elevator that the center rack of large-span domes rack is promoted to precalculated position, structure top by structure bottom, and carry out temporary fixed;

Around center rack and use bolt sphere and the continuous peripheral rack of spelling large-span domes rack of rod member, make peripheral rack connect center rack and structure top.

Above-mentioned center rack by eight bolt sphere truss elevators by structure bottom center Synchronous lifting to precalculated position, structure top, eight bolt sphere truss hoist installation are on structure top, and circumferentially uniformly-spaced arranging around structure.The concrete visible Fig. 2 of bolt sphere truss elevator and Fig. 3, it includes bolt sphere truss, chain sling and power set, bolt sphere truss comprises base 1, frame body 2 and arm frame 3, frame body 2 is fixedly mounted on described base 1, arm frame 3 is fixedly connected on described frame body 2, and arm frame 3 has angle of inclination with respect to frame body 2 and makes the below formation of this arm frame 3 hang a year space, chain sling is arranged on bolt sphere truss, this chain sling matches with described power set, makes this chain sling carry the material of slinging in space hanging.Wherein, bolt sphere truss comprises a plurality of triangular elements, frame body 2 and arm frame 3 build by triangular element, this triangular element comprises shank of bolt and bolt sphere, between two adjacent shanks of bolt, by described bolt sphere, is fixedly linked, and described shank of bolt is linear pattern shank of bolt, the two ends of this linear pattern shank of bolt are equipped with bolt end, bolt end is provided with thread, and bolt sphere is provided with screw, and bolt end makes shank of bolt be fixedly connected with bolt sphere by screwing in described screw.Above-mentioned chain sling includes guiding fixed pulley 4, wire rope 6 and suspension hook, above-mentioned power set are hoist engine 7, described suspension hook is provided with movable pulley, described guiding fixed pulley 4 is fixedly mounted on bolt sphere truss, one end of described wire rope 6 is fixed on the front end of arm frame 3, the other end of wire rope 6 is connected on hoist engine 7 after wearing moving pulley and guiding fixed pulley 4, above-mentioned guiding fixed pulley 4 is made as three, three guiding fixed pulleys 4 are fixedly mounted on respectively the junction of frame body 2 and base 1, frame body 2 and the corner of arm frame 3 and place, the summit of arm frame 3 leading sections.

It should be noted that, Tu4He Tu5 center rack and structure only illustrate a part wherein, and bolt sphere truss elevator only illustrates wherein one.

Said method specifically comprises the following steps:

S101: before Jiang center rack promotes, first select suspension centre.Suspension centre selected followed following principle: (1) guarantees whole stressed the meeting design requirement of center rack; (2) lifting supporting system should meet structural strength requirement; (3) strictly control the distortion of center rack in lifting process.(4) according to suspension centre layout design, reasonably promote system and safety stock; (5) center rod member for grid stress, stability and suspension centre are stressed adopts structure analysis software to carry out computational analysis by just hanging, hang eventually and complete three states.

S102: the suspension centre of center rack is carried out to reinforcement protection.Adjacent segments penalty kick at suspension centre place is used to be reinforced rod member and reinforces ball and reinforce.

S103: for preventing that center rack from producing bulk deformation in lifting process, before lifting, with 8 diameter 15mm wire rope 6 by rack bottom node to drawing, control centre rack bottom radial dimension.

S104: according to construction condition and bolt sphere truss Structure of hoist feature, can adopt construction method artificial in bulk and that tower crane coordinates junior unit to lift to carry out erection bolt ball truss elevator.

First with tower crane, truss material is winched to flooring installation site, truss support is placed in bottom base 1 structure, then manually carry out the in bulk of vertical truss part, guaranteeing that truss support location is firm by itself and bottom base 1 structure welding after errorless.By the assembled truss conical element of figure, each unit is a bolt sphere and four rod members.During installation, establish four team members are installed in mounted panel point, when tower crane winches to installation site all assembled junior units, they are screwed into the high-strength bolt on rod member separately in corresponding bolt sphere hole rapidly, and guarantee that bolt is screwed into the degree of depth.First junior unit uses the same method all the other junior units is in place, until truss installation after installing and finishing.

S105: center rack is tried to hang.Slave node, suspender are installed ready, after lifting process obstruction is all removed, carry out center rack examination and hang.The height that hangs of examination is made as 300mm, and promotes and leave supporting-point 200mm when high at whole center rack, measures suspension centre height, and by the Height Adjustment of each suspension centre to consistent, then each moving point of anchoring card jail.Wherein, when hoist cable is bundled to suspension centre, suspension centre solder sphere and with the crossing rod member of hoist cable on cushioning wooden unit or burlap, prevent the damage to finished product member; And the measuring method of suspension centre height is: sentence at suspension centre the invar tape that same strapping is respectively hung a 30m, insert a round steel on corresponding ground, then measure a bench mark with level gauge.

S106: after preliminary examination is hung, the time that temporarily stops to hang and stop hanging is no less than 0.5 hour, within this time, the stressing conditions of suspender and center rack is checked, formally lifts by crane after no problem identified again.

S107: center rack is formally lifted by crane.During formal lifting, by promoting commander in chief, send formal lifting signal, operating personnel start gauge tap, promote and start.Each suspension centre operation wants synchronous, hoisting velocity 100mm/min.The difference in height of adjacent suspension centre must not be greater than 100mm.Be promoted to (absolute altitude+400mm in place) after height, pull rope and leading block are fixed, the reel of hoist engine 7 locks with mortise lock.

Need to describe, the lifting of center rack, Synchronization Control is key link.In lifting process, the skew of center rack and inclination have impact in various degree to the stress of bolt sphere truss, also can affect the force-bearing situation of central network shelf structure self, make component stress produce redistribution, all totally unfavorable to structure lifting and structure self.Therefore, must guarantee Synchronous lifting in lifting process, the discrepancy in elevation between adjacent suspension centre must not be greater than 100mm.

Above-mentioned center rack promotes and must synchronously lift by eight hoist engines 7, in rack lifting process, when monitoring point, report the information of coming and show lifting uneven (asynchronous), while approaching discrepancy in elevation Permissible limit value, commander can make corresponding adjustment according to site specific.

The first way is that bolt sphere truss elevator corresponding to peak suspended, and other elevator is follow-up to sustained height, and then moves with speed simultaneously.

The second way is to keep gear constant bolt sphere truss elevator corresponding to peak, and other unit is by the corresponding elevator of minimum point 1 gear that accelerates, and gains former shelves (this is only applicable to integral inclination situation) after catching up with successively peak gear.

In the process of above-mentioned formal lifting, the every lifting of center rack 50cm is as a stage, in each stage, all the connection status of hoist cable, the stressing conditions of bolt sphere truss elevator and the stress of suspension centre are checked, and according to actual conditions, the state of suspension centre is adjusted at any time.

In addition, on the rack of center, be hung with plumb bob and invar tape, in the process that Dui center rack promotes, by observing the suspension status of suspension wire hammer, and by invar tape, observe the height of suspension centre, the equilibrium state that observation center rack promotes, and adjust accordingly the equilibrium state of center rack.

S108: the assembled and whole rack seat part of carrying out peripheral rack in the surrounding of the operation platform Shang Yan center of structure rack is divided installation.

The continuous spelling in high-altitude and the bearing of peripheral rack are partly installed, and all utilize scaffold to carry out high altitude bulk, and order is carried out to both sides step by step by bearing.After dome rack integral solder finishes, to the follow-up rod member node of the rack touch-up paint of polishing.

The present embodiment has the following advantages or principle:

1, the splicing due to center rack can complete at Ground Operation, center rack is promoted to the peripheral rack of the continuous spelling in precalculated position, structure top after splicing completes again, and compares with traditional high altitude bulk method, and difficulty of construction reduces, thereby can improve efficiency of construction, more be conducive to control construction quality.And by promote described center rack or large-span domes rack with bolt sphere truss elevator, can realize each suspension centre of center rack better or stressed comparatively uniformly, the lifting of control centre's rack or large-span domes rack preferably, this is conducive to be avoided center rack to break down in lifting process, thereby be more conducive to improve efficiency of construction and control construction quality, workmanship is Cheng You once, thereby also can save construction cost.

2, the bolt sphere truss elevator described in installing many on structure top in advance, and make these many bolt sphere truss elevators circumferentially uniformly-spaced arranging around structure.The stress equalization of each suspension centre and stable when this is conducive to realize lifting center rack.

3, the cooperation between above-mentioned power set, chain sling and bolt sphere truss, make this bolt sphere truss elevator when promoting described center rack, also have easy to operate, easily control and the advantage such as safe and reliable, thereby the lifting of control centre's rack better, this contributes to improve construction quality and efficiency of construction; In addition, owing to having used bolt sphere truss, can make this bolt sphere truss elevator can be better stressed, the weight of Geng Neng center rack, the center rack of making can promote better.

4, the structure design of above-mentioned bolt sphere truss, except bolt sphere truss elevator can be born larger weight, can also be convenient to bolt sphere truss elevator in the installation at structure top.

5, hang the cooperation of carrying on device, power set and bolt sphere truss concrete structure and realized the enhanced feature of bolt sphere truss elevator, and make convenient control of realization of this enhanced feature, easy operating.

6, Xian Dui center rack tries to hang, more formally lifting.Its object be that center rack can be stablized and stress equalization be promoted to precalculated position, structure top.

7, by examination, hang, be conducive to avoid generative center rack in formal lifting process to promote the abnormal conditions such as uneven, and if hang in process and occur that abnormal conditions can more convenient adjustment in examination.

8, the every lifting of center rack 50cm is as a stage, and all the connection status of hoist cable, the stressing conditions of bolt sphere truss elevator and the stress of suspension centre checked in each stage, and according to actual conditions, the state of suspension centre adjusted.Its object is to guarantee that center rack can be promoted to stable equilibrium precalculated position, structure top.

9, before center rack promotes, by 6 pairs of center rack bottom node of wire rope, undertaken drawing.Thereby, can control centre the radial dimension of rack bottom, can prevent that center rack from producing bulk deformation in lifting process.

10, before center rack promotes, the suspension centre place of center rack is reinforced.Thereby, can make the hoisting point position of center rack more firm, hoist cable can be connected with suspension centre more securely.

The above embodiment has only expressed the specific embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (10)

1. use bolt sphere truss elevator to promote a construction method for large-span domes rack, it is characterized in that, comprise the following steps:
The center rack that splices large-span domes rack by rod member;
Use bolt sphere truss elevator that described center rack is promoted to precalculated position, structure top by structure bottom, and carry out temporary fixed;
Around center rack and use the continuous peripheral rack of spelling large-span domes rack of rod member, make peripheral rack connect center rack and structure top.
2. use bolt sphere truss elevator according to claim 1 promotes the construction method of large-span domes rack, it is characterized in that, described center rack by many bolt sphere truss elevators by structure bottom center Synchronous lifting to precalculated position, structure top, before promoting described center rack, bolt sphere truss elevator described in installing many on structure top in advance, and make these many bolt sphere truss elevators circumferentially uniformly-spaced arranging around structure.
3. use bolt sphere truss elevator according to claim 1 and 2 promotes the construction method of large-span domes rack, it is characterized in that, described bolt sphere truss elevator includes bolt sphere truss, chain sling and power set, described bolt sphere truss comprises base, frame body and arm frame, described frame body is fixedly mounted on described base, described arm frame is fixedly connected on it described frame, and arm frame has angle of inclination with respect to frame body and makes the below formation of this arm frame hang a year space, described chain sling is arranged on described bolt sphere truss, this chain sling matches with described power set, make this chain sling carry the material of slinging in space hanging.
4. use bolt sphere truss elevator according to claim 3 promotes the construction method of large-span domes rack, it is characterized in that, described bolt sphere truss comprises a plurality of triangular elements, described frame body and arm frame build by triangular element, this triangular element comprises shank of bolt and bolt sphere, between two adjacent shanks of bolt, by described bolt sphere, be fixedly linked, described shank of bolt is linear pattern shank of bolt, the two ends of this linear pattern shank of bolt are equipped with bolt end, bolt end is provided with thread, described bolt sphere is provided with screw, bolt end makes shank of bolt be fixedly connected with bolt sphere by screwing in described screw.
5. use bolt sphere truss elevator according to claim 3 promotes the construction method of large-span domes rack, it is characterized in that, described chain sling includes guiding fixed pulley, wire rope and suspension hook, described power set are hoist engine, described suspension hook is provided with movable pulley, described guiding fixed pulley is fixedly mounted on described bolt sphere truss, one end of described wire rope is fixed on the front end of described arm frame, the other end of wire rope is on the hoist engine of wearing described in being connected to after described movable pulley and guiding fixed pulley, described guiding fixed pulley is made as three, three guiding fixed pulleys are fixedly mounted on respectively the junction of frame body and base, the place, summit of the corner of frame body and arm frame and arm frame leading section.
6. use bolt sphere truss elevator according to claim 1 promotes the construction method of large-span domes rack, it is characterized in that, in the step of the center of lifting rack, first with bolt sphere truss elevator, center rack is tried to hang, and then formally lifting.
7. use bolt sphere truss elevator according to claim 6 promotes the construction method of large-span domes rack, it is characterized in that, the height that described examination is hung is made as 300mm, and when examination is hung highly for 200mm, measure the height of each suspension centre, and the height of adjusting each suspension centre is on sustained height.
8. use bolt sphere truss elevator according to claim 7 promotes the construction method of large-span domes rack, it is characterized in that, after examination is hung, first temporarily stop promoting center rack, and the connection status of hoist cable, the stressing conditions of bolt sphere truss elevator and the stress of suspension centre are checked, and formally lifting again after inspection is errorless.
9. use bolt sphere truss elevator according to claim 6 promotes the construction method of large-span domes rack, it is characterized in that, in the step of formal lifting, the every lifting of center rack 50cm is as a stage, and in each stage, all the connection status of hoist cable, the stressing conditions of bolt sphere truss elevator and the stress of suspension centre are checked, and according to actual conditions, the state of suspension centre is adjusted.
10. use bolt sphere truss elevator according to claim 9 promotes the construction method of large-span domes rack, it is characterized in that, in the step of formal lifting, in each improvement stage, all guarantee on the rack of center that each suspension centre is with the speed Synchronous lifting of 100mm/min, and guarantee that the difference in height of adjacent two suspension centres of center rack is less than or equal to 100mm.
CN201410293260.2A 2014-06-25 2014-06-25 Construction method for lifting large-span dome net rack by using bolt sphere truss lifter CN104060840A (en)

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CN104594642A (en) * 2014-12-09 2015-05-06 中国化学工程第三建设有限公司 Large-span net rack aloft pairing, installing and overall horizontal moving method
CN105350698A (en) * 2015-10-10 2016-02-24 中国十九冶集团有限公司南京分公司 Large-span dome installation construction method
CN105442853A (en) * 2015-11-13 2016-03-30 中建六局土木工程有限公司 Long-span deformed steel truss and floor steel structure installation and construction method
CN107489199A (en) * 2017-08-31 2017-12-19 中建七局安装工程有限公司 Space Reticulated dome expands lifting construction method by ring
CN107489199B (en) * 2017-08-31 2019-05-17 中建七局安装工程有限公司 Space Reticulated dome expands jack-up construction method by ring
CN109138452A (en) * 2018-10-19 2019-01-04 青岛建集团有限公司 Heavy construction bolt sphere steel pipe rack entirety fast lifting construction technology

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Application publication date: 20140924